JP4103020B2 - Aqueous suspension pesticide composition - Google Patents
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Description
【０００１】
【発明の属する技術分野】
本発明は、家庭園芸用の場面で施用時に水等で希釈することなく、軽く振盪するだけで使用できる水性懸濁状農薬組成物に関し、植物に有害な害虫や病気から守るための各種農薬や、更に除草剤、植物成長調整剤など、家庭園芸用とした広範囲に使用できる農薬組成物に関するものである。
【０００２】
【従来の技術】
一般に家庭園芸用農薬の製剤形態としては、例えば乳剤、水和剤、粒剤、エアゾール剤等があるが、これらのうち乳剤、水和剤は使用前に予め水で５００〜２０００倍程度の使用濃度に希釈して散布されている。このような農薬組成物により植物の病害虫防除や除草作業を行う場合、高濃度の薬剤を使用濃度まで希釈する手間や、希釈時に作業者に与える不快感、悪臭及び手の汚れ等の問題がある。これらの問題を解決すべく、予め水で使用濃度まで希釈され、そのまま散布できる農薬組成物、いわゆる無希釈農薬組成物について種々の提案がなされている（特開平３−１４５４０３号、特開平６−３０５９０４号、特開平８−２６８８０３号、特開平１０−８７４０３号）。
【０００３】
【発明が解決しようとする課題】
一般に、水で希釈することなく予め使用濃度まで希釈された農薬組成物は、農薬有効成分が水溶性である場合はそのまま水に溶解して使用されており、常温で固体かつ水不溶性若しくは水難溶性の農薬有効成分である場合は有機溶剤に溶解して、界面活性剤等を用いて安定な水性乳剤組成物又は水性マイクロエマルジョン組成物として用いられている。しかし、後者の両剤型は農薬有効成分を有機溶剤等に溶解する必要があるために、水性乳剤組成物又は水性マイクロエマルジョン組成物にできる農薬有効成分が限定され、かつ、有機溶剤を使用するために植物によっては薬害を引き起こす問題がある。
【０００４】
これらの問題を解決する農薬組成物としては、例えば農薬有効成分が常温で固体かつ水不溶性若しくは水難溶性である場合は、農薬有効成分を微粒子化して水に懸濁させた水性懸濁状農薬組成物が望ましい。しかし、高濃度水性懸濁状農薬組成物を単に使用濃度まで希釈しただけでは、長時間静置保存すると微粒子状固体農薬有効成分の沈降及び沈降後の凝集による再分散性の不良等で均一な散布液状態が得られず、散布ノズルの目詰まり等を起こして使用不能となる。又、沈降を防止するために増粘剤を増量すれば、粘度が増して散布できず、実用化が困難であった。
本発明の目的は、水又は有機溶剤に溶解が困難な農薬有効成分、溶解すると残効性若しくは成分安定性等が低下する農薬有効成分又は毒性の増強等の安全性に問題を有し固体粒子状での使用が望ましい農薬有効成分等の低濃度無希釈水性懸濁状農薬組成物を提供することにある。
【０００５】
【課題を解決するための手段】
本発明者等は前記課題を解決すべく、鋭意研究を重ねた結果、本発明を完成させたものである。
本発明は、平均粒径が１μｍ以下である常温で固体かつ水不溶性又は水難溶性の農薬有効成分１種以上と、分散剤、界面活性剤及び水からなる予め直接使用濃度に調整された水性懸濁状農薬組成物であって、分散剤としてアタパルガイト又はモンモリロナイトから選択される１種以上の粘土鉱物精製物系分散剤を使用してなり、静置時に該農薬組成物水相下部に形成される沈降層が、軽い振盪により容易に再分散して懸濁液となる水性懸濁状農薬組成物に関するものである。
【０００６】
【発明の実施の形態】
本発明で使用する常温で固体かつ水不溶性又は水難溶性の農薬有効成分としては、例えば２−ターシャリーブチルイミノ−３−イソプロピル−５−フェニル−３，４，５，６−テトラヒドロ−２Ｈ−１，３，５−チアジアジン−４−オン（一般名：ブプロフェジン）、tert−ブチル＝（Ｅ）−α−（１，３−ジメチル−５−フェノキシピラゾール−４−イルメチレンアミノオキシ）−ｐ−トルアート（一般名：フェンピロキシメート）、Ｎ−tert−ブチル−Ｎ’−（４−エチルベンゾイル）−３，５−ジメチルベンンゾヒドラジド（一般名：テブフェノジド）、（±）−５−アミノ−１−（２，６−ジクロロ−α，α，α−トリフルオロ−ｐ−トルイル）−４−トリフルオロメチルスルフィニルピラゾール−３−カルボニトリル（一般名：フィプロニル）等の殺虫活性成分、α，α，α−トリフルオロ−３’−イソプロポキシ−ｏ−トルアニリド（一般名：フルトラニル）、２，３−ジシアノ−１，４−ジチアアンスラキノン（一般名：ジチアノン）、テトラクロロイソフタロニトリル（一般名：ＴＰＮ）等の殺菌活性成分、メチル＝α−（４，６−ジメトキシピリミジン−２−イルカルバモイルスルファモイル）−ｏ−トルアート（一般名：ベンスルフロンメチル）、２−クロロ−Ｎ−（３−メトキシ−２−テニル）−２’，６’−ジメチルアセトアニリド（一般名：テニルクロール）、エチル＝２−クロロ−５−（４─クロロ−５−ジフルオロメトキシ−１−メチル−１Ｈ−ピラゾール−３−イル）−４−フルオロフェノキシアセテート（一般名：ピラフルフェン−エチル）等の除草活性成分を例示することができ、その配合割合は０．０００１〜０．１重量％の範囲で使用すれば良い。
又、これらの農薬有効成分は平均粒子径１μｍ以下に粉砕して使用し、好ましくは０．１〜０．５μｍの範囲である。
【０００７】
又、本発明の水性懸濁状農薬組成物は、水で希釈することなくそのまま直接散布できる低濃度無希釈農薬組成物であるので、その重量％の大半を水が占めるため、必要に応じて水溶性農薬有効成分を配合しても良く、水溶性農薬有効成分としては、例えば（Ｅ）−Ｎ1-〔（６−クロロ−３−ピリジル）メチル〕−Ｎ2-シアノ−Ｎ1-メチルアセトアミジン（一般名：アセタミプリド）、Ｏ，Ｓ−ジメチル−Ｎ−アセチルホスホロアミドチオエート（一般名：アセフェート）等の殺虫活性成分、２−ｐ−クロロフェニル−２−（１Ｈ）−１，２，４−トリアゾール−１−イルメチル）ヘキサンニトリル（一般名：ミクロブタニル）、２−メトキシ−Ｎ−（２−オキソ−１，３−オキサゾリジン−３−イル）アセト−２’，６’−キシリジド（一般名：オキサジキシル）等の殺菌活性成分、Ｎ−（ホスホノメチルグリシナート（一般名：グリホサート）及びそのアンモニウム塩、ナトリウム塩、イソプロピルアミン塩又はトリメシウム塩、ＤＬ−ホモアラニン−４−イル（メチル）ホスフィナート（一般名：グリホシネート）及びそのアンモニウム塩等の除草活性成分を例示することができ、その配合割合は０．０００１〜０．１重量％の範囲で使用すれば良い。
【０００８】
本発明で分散剤として使用するアタパルガイト又はモンモリロナイトから選択される１種以上の粘土鉱物精製物系分散剤の配合割合は０．００１〜０．５重量％の範囲から選択して使用すれば良い。
又、本発明の水性懸濁状農薬組成物はその他の成分として、湿展・分散を目的とした界面活性剤、凍結復元剤、消泡剤、防腐剤、増粘剤等を添加することができる。
界面活性剤としては、例えばポリオキシアルキレンアルキルエーテル、ポリオキシアルキレンアルキルフェニルエーテル、ポリオキシアルキレンアルキルフェニルエーテルのホルマリン縮合物、ポリオキシアルキレンポリスチリルフェニルエーテル、ポリオキシアルキレンアルキルエーテル亜硫酸塩、ポリオキシアルキレンポリスチリルフェニルエーテルリン酸塩、ジオクチルスルホコハク酸塩、アルキルベンゼンスルホン酸塩、リグニンスルホン酸塩等を例示することができ、これらの界面活性剤は単独で、又は２種以上混合して使用することができる。
【０００９】
凍結復元剤としては、例えばエチレングリコール、プロピレングリコール、グリセリン等を、消泡剤としては、例えばジメチルポリシロキサン、アセチレンアルコール等を、防腐剤としては、例えばホルマリン、ベンズイソチアゾロン等を例示することができる。さらに必要に応じて有機溶剤、安定化剤、色素類等のその他成分を配合することもできる。
本発明の水性懸濁状農薬組成物は１μｍ以下に微粉砕された農薬活性成分、分散剤、界面活性剤と、所望成分としての凍結復元剤、消泡剤、防腐剤、増粘剤等と、水とを混合し、農薬製剤上の常法により製造することができる。
以下に本発明の実施例、試験例等を例示するが、本発明はこれらに限定されるものではない。
【００１０】
【実施例】
実施例１．
ピラフルフェン−エチル３０．０重量％、ポリオキシエチレンアルキルフェニルエーテル０．７０重量％、ポリオキシエチレンポリスチリルフェニルエーテル１．００重量％、プロピレングリコール６．２５重量％、ベンズイソチアゾロン０．１５重量％、ジメチルポリシロキサン０．５０重量％及び水６１．４０重量％をＴＫホモミキサー（特殊機化工業製）にて混合・均一化し、ダイノミルＫＤＬ（シンマルエンタープライゼズ製）にて平均粒径０．４μｍまで湿式微粉砕し、得られた微粒子状農薬有効成分を含む微粉砕物０．１７重量％（農薬有効成分として０．０５％）、アタパルガイト粉末５％水溶液０．５０重量％（アタパルガイトとして０．０２５％）、プロピレングリコール１０．００重量％、ベンズイソチアゾロン０．１０重量％、ジメチルポリシロキサン０．０１重量％及び水８９．２２重量％を加えて混合・均一化することにより、水性懸濁状農薬組成物を得た。
得られた水性懸濁状農薬組成物は、長時間静置しておくと該組成物の下部に微粒子状農薬有効成分及びアタパルガイトを含む沈降物が生じてくるが、この沈降物は軽く数回振盪するだけで容易に再分散し、均一な水性懸濁状農薬組成物となり、この均一な状態は比較的長時間（数十分〜数時間）維持されるので、散布までに十分に時間的余裕があり、好適に散布できることは勿論、散布中に不都合なことが生じることはない。
【００１１】
実施例２〜６及び比較例１〜１２
表１及び表２に記載の微粉砕農薬有効成分 ０．０５０重量％
表１及び表２に記載の分散剤 表１及び表２に記載の重量％
ポリオキシエチレンアルキルフェニルエーテル ０．００１２重量％
ポリオキシエチレンポリスチリルフェニルエーテル ０．００１７重量％
プロピレングリコール １０．００重量％
ベンズイソチアゾロン ０．１００重量％
ジメチルポリシロキサン ０．０１０重量％
水 残部
以上を均一に混合し、水性懸濁状農薬組成物を得た。
【００１２】
試験例１．
実施例１〜６及び比較例１〜１２で得られた水性懸濁状農薬組成物を１００ｍｌのガラス瓶に入れて密封し、調製直後の分散状態を観察し、その後、室温下で６ケ月静置して分散状態（静置時分散性）を観察し、次いで容器を軽く数回振盪して再分散状態（再分散性）及び再分散後の分散安定性（分散安定性）を調査し、最後に通常の農薬散布器での散布の可否（散布性）を調査し、下記の基準に従って判定を行った。尚、調製直後の分散状態は全て均一に分散していた。
（ａ）静置時分散性（静置時の農薬有効成分の分散状態）。
Ａ ： 農薬有効成分が均一に分散。
Ｂ ： 農薬有効成分が下部に沈降し、緩やかな沈降層を形成。
Ｃ ： 農薬有効成分が下部に沈降・凝集し、ハードケーキを形成。
（ｂ）再分散性（静置後、軽く数回振盪した時の状態）。
○ ： 均一に分散する。
△ ： ほぼ均一に分散するが、一部凝集物がある。
× ： 大きな凝集があり、使用不可能。
【００１３】
（ｃ）分散安定性（再分散後、均一に分散している時間）。
○ ： １時間以上均一分散状態を維持する。
△ ： ５分〜１時間分散する。
× ： ０〜５分間分散する（５分後には沈降する）。
− ： 再分散しないため、評価不不可。
（ｄ）散布性（通常の農薬散布器での散布の可否）。
○ ： 散布可能
× ： 散布不可
− ： 再分散しないため評価不可
実施例の結果を第１表に、比較例の結果を第２表に示す。
【００１４】
【表１】
【表２】
第１表の本発明の実施例の結果より、本発明の１μｍ以下に微粉砕して懸濁させた農薬有効成分及び分散剤としてアタパルガイト又はモンモリロナイトから選択される１種以上の粘土鉱物精製物系分散剤を添加した水性懸濁状農薬組成物は、保存静置時の分散状態は下部に沈降して沈降層を形成するが、軽い数回の振盪で再分散し、均一な水性懸濁状農薬組成物となり、再分散状態が比較的長時間均一な状態で維持されるので、予め水で使用濃度まで希釈され、そのまま散布可能な水性懸濁状農薬組成物であるのに対して、第２表の比較例の結果からは農薬有効成分を１μｍ以下に微粉砕しても、分散剤がヘクトライト（粘土鉱物精製物系分散剤）やキサンタンガム（多糖類系分散剤）の場合には、再分散性は全く認められず、アタパルガイト又はモンモリロナイトを使用しても、農薬有効成分の平均粒子径が１μｍ以上であると再分散性が著しく劣った。
【００１７】
試験例２．
実施例１及び比較例２で得られた水性懸濁状農薬組成物の調製直後の該組成物及び室温下に６ケ月静置後の組成物をオナモミ（草丈３０ｃｍ、ポット植え）を対象に除草効果試験を行い、下記の基準に従って効果の判定を行った。尚、室温下に６ケ月静置後の組成物は数回軽く振盪してから散布した。結果を第３表に示す。
【表３】
【００１９】
【発明の効果】
本発明の水性懸濁状農薬組成物は、常温で固体かつ水不溶性又は水難溶性の農薬有効成分を平均粒子径１μｍ以下に微粉砕し、アタパルガイト及びモンモリロナイトから選択される粘土鉱物精製物系分散剤を使用することにより、長期間静置保存後の再分散性及び再分散後の分散安定性に優れた水性懸濁状農薬組成物である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an aqueous suspension pesticide composition that can be used by simply shaking it without diluting it with water or the like at the time of application in a home gardening scene, and various pesticides for protecting against harmful insects and diseases harmful to plants. Furthermore, the present invention relates to an agrochemical composition that can be used in a wide range of home gardening, such as herbicides and plant growth regulators.
[0002]
[Prior art]
Generally, there are, for example, emulsions, wettable powders, granules, aerosols, etc., as preparation forms for home gardening pesticides. Of these, emulsions and wettable powders are used in water about 500 to 2000 times before use. It is sprayed diluted to a concentration. When pest control or herbicidal work of plants is carried out with such an agrochemical composition, there are problems such as the trouble of diluting a high concentration drug to the use concentration, discomfort given to the worker at the time of dilution, malodor and hand stains, etc. . In order to solve these problems, various proposals have been made on agrochemical compositions that have been diluted with water in advance to a use concentration and can be sprayed as they are, so-called undiluted agricultural chemical compositions (JP-A-3-145403, JP-A-6-6). 305904, JP-A-8-268803, JP-A-10-87403 ).
[0003]
[Problems to be solved by the invention]
In general, agrochemical compositions previously diluted to the use concentration without being diluted with water are used by dissolving in water as they are when the agrochemical active ingredient is water-soluble, and are solid at room temperature and insoluble or sparingly soluble in water. In the case of a pesticidal active ingredient, it is dissolved in an organic solvent and used as a stable aqueous emulsion composition or aqueous microemulsion composition using a surfactant or the like. However, since the latter two-drug type needs to dissolve the pesticidal active ingredient in an organic solvent or the like, the pesticidal active ingredient that can be made into an aqueous emulsion composition or an aqueous microemulsion composition is limited, and an organic solvent is used. In some plants, there are problems that cause phytotoxicity.
[0004]
As an agrochemical composition that solves these problems, for example, when the active ingredient of an agricultural chemical is solid at room temperature and is insoluble or hardly soluble in water, an aqueous suspended agricultural chemical composition in which the active ingredient of the agricultural chemical is finely divided and suspended in water Things are desirable. However, simply diluting the high-concentration aqueous suspension pesticide composition to the use concentration is uniform due to poor redispersibility due to sedimentation of the fine-grained solid pesticide active ingredient and agglomeration after sedimentation when stored for a long time. The spray liquid state cannot be obtained, and the spray nozzle becomes clogged and becomes unusable. Further, if the amount of the thickening agent is increased in order to prevent sedimentation, the viscosity increases and the spraying cannot be carried out, making it difficult to put it to practical use.
It is an object of the present invention to provide an active ingredient for agricultural chemicals which is difficult to dissolve in water or an organic solvent, an active ingredient for agricultural chemicals whose residual effect or ingredient stability decreases when dissolved, or a problem with safety such as enhanced toxicity, and solid particles. It is an object to provide a low concentration undiluted aqueous suspension agricultural chemical composition such as an agricultural chemical active ingredient which is preferably used in the form of a liquid.
[0005]
[Means for Solving the Problems]
The present inventors have completed the present invention as a result of intensive studies to solve the above problems.
The present invention is an aqueous suspension which is adjusted to a direct use concentration in advance, comprising at least one agrochemical active ingredient which is solid at room temperature and has an average particle size of 1 μm or less and is water-insoluble or sparingly water-soluble, a dispersant, a surfactant and water. A turbid pesticide composition comprising at least one clay mineral purified dispersant selected from attapulgite or montmorillonite as a dispersant, and formed at the bottom of the aqueous phase of the pesticide composition upon standing The settled layer relates to an aqueous suspension agricultural chemical composition that is easily redispersed by light shaking to form a suspension.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The agrochemical active ingredient that is solid at room temperature and water-insoluble or poorly water-soluble used in the present invention is, for example, 2-tertiarybutylimino-3-isopropyl-5-phenyl-3,4,5,6-tetrahydro-2H-1. , 3,5-thiadiazin-4-one (generic name: buprofezin), tert-butyl = (E) -α- (1,3-dimethyl-5-phenoxypyrazol-4-ylmethyleneaminooxy) -p-toluate (Generic name: fenpyroximate), N-tert-butyl-N ′-(4-ethylbenzoyl) -3,5-dimethylbenzzohydrazide (generic name: tebufenozide), (±) -5-amino-1- ( 2,6-dichloro-α, α, α-trifluoro-p-toluyl) -4-trifluoromethylsulfinylpyrazole-3-carbonitrile (generic name: fiproni ) And other insecticidal active ingredients, α, α, α-trifluoro-3′-isopropoxy-o-toluanilide (generic name: flutolanil), 2,3-dicyano-1,4-dithiaanthraquinone (generic name) : Dithianon), bactericidal active ingredients such as tetrachloroisophthalonitrile (generic name: TPN), methyl = α- (4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl) -o-toluate (generic name: Bence) Ruflon methyl), 2-chloro-N- (3-methoxy-2-enyl) -2 ′, 6′-dimethylacetanilide (generic name: tenylchlor), ethyl = 2-chloro-5- (4-chloro-5- Herbicidal active ingredients such as difluoromethoxy-1-methyl-1H-pyrazol-3-yl) -4-fluorophenoxyacetate (generic name: pyraflufen-ethyl) It can be exemplified. The mixing ratio may be used in the range of 0.0001 to 0.1 wt%.
Further, these agrochemical active ingredients are used after being pulverized to an average particle size of 1 μm or less, and preferably in the range of 0.1 to 0.5 μm.
[0007]
In addition, since the aqueous suspension pesticide composition of the present invention is a low-concentration undiluted pesticide composition that can be directly sprayed without being diluted with water, water accounts for most of its weight%. A water-soluble agricultural chemical active ingredient may be blended, and examples of the water-soluble agricultural chemical active ingredient include (E) -N 1 -[(6-chloro-3-pyridyl) methyl] -N 2 -cyano-N 1 -methyl. Insecticidal active ingredients such as acetamidine (generic name: acetamiprid), O, S-dimethyl-N-acetyl phosphoroamidothioate (generic name: acephate), 2-p-chlorophenyl-2- (1H) -1,2 , 4-Triazol-1-ylmethyl) hexanenitrile (generic name: microbutanyl), 2-methoxy-N- (2-oxo-1,3-oxazolidine-3-yl) aceto-2 ′, 6′-xylidide (general : Bactericidal active ingredient such as oxadixyl), N- (phosphonomethylglycinate (generic name: glyphosate) and its ammonium salt, sodium salt, isopropylamine salt or trimesium salt, DL-homoalan-4-yl (methyl) phosphinate ( (Generic name: glyphosate) and herbicidal active ingredients such as ammonium salts thereof can be exemplified, and the blending ratio thereof may be 0.0001 to 0.1% by weight.
[0008]
The blending ratio of one or more types of purified clay mineral-based dispersants selected from attapulgite or montmorillonite used as a dispersant in the present invention may be selected from a range of 0.001 to 0.5% by weight.
In addition, the aqueous suspension pesticide composition of the present invention may contain, as other components, a surfactant, a freeze-restoring agent, an antifoaming agent, a preservative, a thickener, etc. for the purpose of spreading and dispersing. it can.
Examples of the surfactant include polyoxyalkylene alkyl ether, polyoxyalkylene alkyl phenyl ether, formalin condensate of polyoxyalkylene alkyl phenyl ether, polyoxyalkylene polystyryl phenyl ether, polyoxyalkylene alkyl ether sulfite, polyoxyalkylene Polystyryl phenyl ether phosphate, dioctyl sulfosuccinate, alkylbenzene sulfonate, lignin sulfonate, etc. can be exemplified, and these surfactants may be used alone or in combination of two or more. it can.
[0009]
Examples of the freeze restoring agent include ethylene glycol, propylene glycol, glycerin and the like, examples of the antifoaming agent include dimethylpolysiloxane and acetylene alcohol, and examples of the antiseptic include formalin and benzisothiazolone. . Furthermore, other components such as an organic solvent, a stabilizer, and pigments can be blended as necessary.
The aqueous suspension pesticide composition of the present invention comprises an agrochemical active ingredient, a dispersant, a surfactant finely pulverized to 1 μm or less, and a freeze-restoring agent, an antifoaming agent, an antiseptic, a thickener and the like as desired components. It can be produced by mixing with water and using a conventional method on an agrochemical formulation.
Examples of the present invention, test examples, and the like are illustrated below, but the present invention is not limited to these.
[0010]
【Example】
Example 1.
Piraflufen-ethyl 30.0% by weight, polyoxyethylene alkylphenyl ether 0.70% by weight, polyoxyethylene polystyryl phenyl ether 1.00% by weight, propylene glycol 6.25% by weight, benzisothiazolone 0.15% by weight, Mix and homogenize 0.50% by weight of dimethylpolysiloxane and 61.40% by weight of water with TK homomixer (manufactured by Koki Kogyo Kogyo Co., Ltd.) and average particle size up to 0.4μm with Dinomill KDL (manufactured by Shinmaru Enterprises) 0.17% by weight of finely pulverized pesticide active ingredient obtained by wet pulverization (0.05% as a pesticide active ingredient), 0.5% by weight of attapulgite powder 5% aqueous solution (0.025 as attapulgite) %), Propylene glycol 10.00% by weight, benzisothiazolone 0.1 Wt%, by mixing and homogenizing the addition of dimethylpolysiloxane 0.01 wt% and 89.22 wt% water to obtain a pesticidal composition.
When the aqueous suspension pesticide composition obtained is allowed to stand for a long time, a precipitate containing the fine particulate pesticide active ingredient and attapulgite is formed at the bottom of the composition. It can be easily re-dispersed just by shaking, resulting in a uniform aqueous suspension pesticide composition. This uniform state is maintained for a relatively long time (tens of minutes to several hours), so it takes enough time to spray. Of course, there is a margin and it can be suitably sprayed, and inconvenience does not occur during spraying.
[0011]
Examples 2-6 and Comparative Examples 1-12
Active ingredient of finely pulverized agricultural chemicals listed in Tables 1 and 2 0.050% by weight
Dispersant described in Table 1 and Table 2% by weight described in Table 1 and Table 2
Polyoxyethylene alkyl phenyl ether 0.0012% by weight
Polyoxyethylene polystyryl phenyl ether 0.0017% by weight
Propylene glycol 10.00% by weight
Benzisothiazolone 0.100% by weight
Dimethylpolysiloxane 0.010% by weight
The remaining water or more was uniformly mixed to obtain an aqueous suspended agricultural chemical composition.
[0012]
Test Example 1
The aqueous suspension pesticide compositions obtained in Examples 1 to 6 and Comparative Examples 1 to 12 were sealed in 100 ml glass bottles, and observed for dispersion immediately after preparation, and then allowed to stand at room temperature for 6 months. Then, observe the dispersion state (dispersibility when standing), and then shake the container several times to investigate the redispersion state (redispersibility) and the dispersion stability after dispersion (dispersion stability). In addition, the possibility of spraying with a normal pesticide sprayer (sprayability) was investigated and judged according to the following criteria. Note that the dispersion state immediately after preparation was uniformly dispersed.
(A) Dispersibility at the time of standing (dispersion state of active ingredients of agrochemicals at the time of standing).
A: Agrochemical active ingredients are uniformly dispersed.
B: Pesticide active ingredient settles in the lower part and forms a gentle sedimentation layer.
C: Agrochemical active ingredients settle and aggregate at the bottom to form a hard cake.
(B) Redispersibility (state when lightly shaken several times after standing).
○: Disperse uniformly.
Δ: Dispersed almost uniformly but partially aggregated.
X: Unusable due to large aggregation.
[0013]
(C) Dispersion stability (time of uniform dispersion after redispersion).
○: Maintain a uniformly dispersed state for 1 hour or more.
Δ: Dispersed for 5 minutes to 1 hour.
X: Dispersed for 0 to 5 minutes (settling after 5 minutes).
−: Evaluation is not possible because it is not redispersed.
(D) Dispersibility (whether it can be sprayed with a normal pesticide sprayer).
○: Can be sprayed ×: Cannot be sprayed −: Cannot be evaluated because it is not redispersed Table 1 shows the results of the examples and Table 2 shows the results of the comparative examples.
[0014]
[Table 1]
[Table 2]
From the results of the examples of the present invention shown in Table 1, one or more kinds of purified clay minerals selected from attapulgite or montmorillonite as a pesticidal active ingredient and a dispersing agent finely pulverized and suspended to 1 μm or less of the present invention. The aqueous suspension pesticide composition to which a dispersant has been added is settled at the bottom when it is stored at rest to form a sedimentation layer, but it is redispersed with a few light shakings to form a uniform aqueous suspension. Since it becomes an agrochemical composition and the redispersed state is maintained in a uniform state for a relatively long time, it is diluted with water in advance to the use concentration and can be sprayed as it is. From the results of the comparative examples in Table 2, even if the pesticidal active ingredient is finely pulverized to 1 μm or less, when the dispersant is hectorite (clay mineral refined dispersant) or xanthan gum (polysaccharide dispersant), No redispersibility was observed, attapulgite Or even if montmorillonite was used, redispersibility was remarkably inferior when the average particle diameter of the active ingredient of the agricultural chemical was 1 μm or more.
[0017]
Test Example 2
Weeding the composition immediately after the preparation of the aqueous suspension pesticide composition obtained in Example 1 and Comparative Example 2 and the composition after standing at room temperature for 6 months for sapling (plant height 30 cm, pot planted) An effect test was conducted and the effect was determined according to the following criteria. The composition after standing for 6 months at room temperature was shaken several times and then sprayed. The results are shown in Table 3.
[Table 3]
[0019]
【The invention's effect】
The aqueous suspended pesticide composition of the present invention is a clay mineral purified dispersant selected from attapulgite and montmorillonite by pulverizing a pesticidal active ingredient that is solid at room temperature and water-insoluble or poorly water-soluble to an average particle size of 1 μm or less. Is an aqueous pesticide composition excellent in redispersibility after standing storage for a long period of time and dispersion stability after redispersion.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30370198A JP4103020B2 (en) | 1998-10-26 | 1998-10-26 | Aqueous suspension pesticide composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30370198A JP4103020B2 (en) | 1998-10-26 | 1998-10-26 | Aqueous suspension pesticide composition |
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| Publication Number | Publication Date |
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| JP2000128704A JP2000128704A (en) | 2000-05-09 |
| JP4103020B2 true JP4103020B2 (en) | 2008-06-18 |
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| JP30370198A Expired - Fee Related JP4103020B2 (en) | 1998-10-26 | 1998-10-26 | Aqueous suspension pesticide composition |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002187801A (en) * | 2000-12-20 | 2002-07-05 | Nippon Nohyaku Co Ltd | Redispersibility improver, method for improving redispersibility, and solid dispersion-based preparation improved in redispersibility |
| JP2007045728A (en) * | 2005-08-09 | 2007-02-22 | Nippon Nohyaku Co Ltd | Water-based horticultural pesticide composition |
| CN100424139C (en) * | 2006-08-25 | 2008-10-08 | 蒋文兰 | Concave convex rod suspension agent |
| CN101491248B (en) * | 2008-01-22 | 2012-04-18 | 北京绿色农华植保科技有限责任公司 | Preparation method of fenpyroximate suspending agent |
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